package com.itheima.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.itheima.mapper.EmpExprMapper;
import com.itheima.mapper.EmpMapper;
import com.itheima.pojo.*;
import com.itheima.service.EmpService;
import com.itheima.utils.JwtUtils;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.util.CollectionUtils;

import java.time.LocalDateTime;
import java.util.Arrays;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

@Slf4j
@Service
public class EmpServiceImpl implements EmpService {

    @Autowired
    private EmpMapper empMapper;
    @Autowired
    private EmpExprMapper empExprMapper;
    //------------------------原始分页查询-----------------------------
   /* @Override
    public PageResult<Emp> page(Integer page, Integer pageSize) {
       Long total = empMapper.conut();

       Integer start = (page-1)*pageSize;
        List<Emp> rows =  empMapper.list(start,pageSize);

        return new PageResult<Emp>(total,rows);
    }*/


    //-------------------------PageHelper分页插件----------------------------------------------
    @Override
    public PageResult<Emp> page (EmpQueryParam empQueryParam) {
        PageHelper.startPage(empQueryParam.getPage(),empQueryParam.getPageSize());
        List<Emp> empList  = empMapper.list(empQueryParam);
        Page<Emp> p =  (Page<Emp>) empList;
        return new PageResult<Emp>(p.getTotal(),p.getResult());
    }

    @Transactional(rollbackFor = Exception.class)
    @Override
    public void save(Emp emp) {
        emp.setCreateTime(LocalDateTime.now());
        emp.setUpdateTime(LocalDateTime.now());
        empMapper.insert(emp);

        List<EmpExpr> exprList = emp.getExprList();
        if(!CollectionUtils.isEmpty(exprList)){
            exprList.forEach(empExpr -> {
                empExpr.setEmpId(emp.getId());
            });

            empExprMapper.insertBatch(exprList);
        }
    }

    @Transactional(rollbackFor = Exception.class)
    @Override
    public void delete(List<Integer> ids) {
        empMapper.deleteByIds(ids);
        empExprMapper.deleteByEmpIds(ids);
    }

    @Override
    public Emp getInfo(Integer id) {
        return empMapper.getById(id);
    }

    @Transactional(rollbackFor = Exception.class)
    @Override
    public void update(Emp emp) {
        emp.setUpdateTime(LocalDateTime.now());
        empMapper.updateById(emp);

        empExprMapper.deleteByEmpIds(Arrays.asList(emp.getId()));
        List<EmpExpr> exprList = emp.getExprList();
        if(!CollectionUtils.isEmpty(exprList)){
            exprList.forEach(empExpr -> empExpr.setEmpId(emp.getId()));
            empExprMapper.insertBatch((exprList));
        }
    }

    @Override
    public List<Emp> select() {
        List<Emp> emps = empMapper.select();
        return emps;
    }

    @Override
    public LoginInfo login(Emp emp) {
        Emp e = empMapper.selectByUsernameAndPassword(emp);

        if(e != null){
            log.info("登录成功,员工信息：{}",e);
//            生成jwt令牌
            Map<String,Object> claims = new HashMap<>();
            claims.put("id",e.getId());
            claims.put("username",e.getUsername());
            String jwt = JwtUtils.generateToken( claims);
             return new LoginInfo(e.getId(),e.getUsername(),e.getName(),jwt);

        }
        else return null;
    }

}
